Perhaps you should try some spelling variations:
cua triet » su triet, va triet
cua viet » ca viet, hoa viet, cua vat
vu khach » vu khanh, vu khac, vay khach
hanh vai » hanh vi, hanh va, hanh tai
van hanh » van thanh, ban hanh, van anh
tuc van » thuc van, truc van, tuc va
su sach » so sach, vu sach
cac tuc » cac toc, cac tu, cac tac
tang ma » mang may, tang van
ky tang » ky nang, ky dang, kho tang
hieu ve » hieu va, hieu van
ve cac » va cac, vien cac
ma hoi » mai hoi, xa hoi, ma hoa

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((su sach) or (vu khach)) ky tang ma hoi. hieu ve cac tuc van hanh vai ((cua triet) OR (cua viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (vu khach)) ky tang ma hoi. hieu ve cac tuc van hanh vai ((cua triet) OR (cua viet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) or (vu khach)) ky tang ma hoi. hieu ve cac tuc van hanh vai ((cua triet) OR (cua viet))".
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (vu khach)) ky tang ma hoi. hieu ve cac tuc van hanh vai ((cua triet) OR (cua viet))*.